 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 12854 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8044
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| In English (Mech. Solids): | | 4810 |
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| A.M. Lokoshchenko, "Modeling the Long-Term Strength of Metals in an Unsteady Complex Stress State," Mech. Solids. 53 (S1), 88-100 (2018) |
| Year |
2018 |
Volume |
53 |
Number |
S1 |
Pages |
88-100 |
| DOI |
10.3103/S0025654418030081 |
| Title |
Modeling the Long-Term Strength of Metals in an Unsteady Complex Stress State |
| Author(s) |
A.M. Lokoshchenko (Institute of Mechanics, Lomonosov Moscow State University, Moscow, 119991 Russia, loko@imec.msu.ru) |
| Abstract |
The known results of tests for long-term strength in an unsteady complex stress state are
simulated using the kinetic theory. Experimental data are usually described using a vector damage
parameter with a piecewise-constant damage accumulation rate. The long-term strength of tubular
samples is simulated under the simultaneous action of a constant axial stress and a shear stress once or
periodically changing sign. To describe the known effect in which the time to fracture in a uniaxial
plane stress state is several times smaller than the time to fracture under a uniaxial tension, a variant of
Yu.N. Rabotnov’s kinetic theory with additional consideration of the anisotropy of the material is proposed. The long-term strength with an abrupt change in the stress intensity is simulated by two methods: with allowance for the damage accumulation only in the creep process and with allowance for the
additional damage accumulation under instant loading. All the variants of the kinetic equations proposed lead to a good agreement between the experimental and theoretical values of the time to fracture. |
| Received |
22 June 2016 |
| Link to Fulltext |
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